1782241 has 2 divisors, whose sum is σ = 1782242. Its totient is φ = 1782240.

The previous prime is 1782239. The next prime is 1782269. The reversal of 1782241 is 1422871.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 16 = 1335^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 1782241 - 2¹ = 1782239 is a prime.

Together with 1782239, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1782211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891120 + 891121.

It is an arithmetic number, because the mean of its divisors is an integer number (891121).

2^1782241 is an apocalyptic number.

It is an amenable number.

1782241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782241 is an equidigital number, since it uses as much as digits as its factorization.

1782241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 25.

The square root of 1782241 is about 1335.0059924959. The cubic root of 1782241 is about 121.2426657979.

The spelling of 1782241 in words is "one million, seven hundred eighty-two thousand, two hundred forty-one".